merge bemdecl: lost modifier without values

[blond]

bemdecl-1.js

exports.blocks = [{
    name: 'block-1',
    mods: [{ name: 'mod' }]
}];

bemdecl-2.js

exports.blocks = [
    { name: 'block-2' }
];

If merge bemdecl-1.js with bemdecl-2.js:

exports.blocks = [
    { name: 'block-1' },
    { name: 'block-2' }
];

expected:

exports.blocks = [
    {
        name: 'block-1',
        mods: [{ name: 'mod' }]
    },
    { name: 'block-2' }
];